How to build a serial cable for Celestron NexStar telescopes.
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The telescope has a keyboard from where you can first align, then control the telescope itself to track various objects. It has a simple display which is useful to select options from a list, but it can't provide a graphical representation of the sky.
![Telescope's keyboard](mids/img_3414.jpg)
![Telescope's keyboard](mids/img_3414.jpg)